The macOS system must enforce FileVault.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-277166 | APPL-26-005020 | SV-277166r1148950_rule | CCI-001199 | high |
| Description | ||||
| The information system implements cryptographic mechanisms to protect the confidentiality and integrity of information stored on digital media during transport outside of controlled areas. Satisfies: SRG-OS-000185-GPOS-00079, SRG-OS-000404-GPOS-00183, SRG-OS-000405-GPOS-00184 | ||||
| STIG | Date | |||
| Apple macOS 26 (Tahoe) Security Technical Implementation Guide | 2026-02-11 | |||
Details
Check Text (C-277166r1148950_chk)
Verify the macOS system is configured to enforce FileVault with the following command:
dontAllowDisable=$(/usr/bin/osascript -l JavaScript << EOS
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\
.objectForKey('dontAllowFDEDisable').js
EOS
)
fileVault=$(/usr/bin/fdesetup status | /usr/bin/grep -c "FileVault is On.")
if [[ "$dontAllowDisable" == "true" ]] && [[ "$fileVault" == 1 ]]; then
echo "1"
else
echo "0"
fi
If the result is not "1", this is a finding.
Fix Text (F-81226r1148949_fix)
Refer to the FileVault supplemental to implement this rule. Configure the macOS system to enforce FileVault by installing the "com.apple.MCX" configuration profile.